Resistance unit.



W. L. BLISS. RESISTANCE UNIT.

APPLIGATION FILED JAN. 6,1911.

1,073,320. Patented Sept 16, 1913.

Q -W i UNITED STATES PATENT OFFICE.

WILLIAM L. BLISS, 0F NIAGARA BALLS, NEW YflRK, ASSIGNOR TO THE UNITED STATES LIGHT 86 HEATING COMYANY, OF NEW YORK, N.. Y A CORPORATION OF MAINE.

assurance UNIT.

Specification of Letters Patent.

Application filed January 6. p i No- 601,084.

"To all whom it may concern of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to resistance units and to terminal connections therefor.

One of the objects of the invention is to provide simple and effective means whereby a resistance unit may be'readily connected in circuit and disconnected therefrom simply by forcing it or snappingit into resilient terminal clips or forcibly withdrawing it therefrom.

In the accompanying drawings I have illustrated one of a number of possible, simple and practical embodiments of my invention.

Figure 1 is a side elevation of this embodiment partly insection. Fig. 2 is an end view of the device. Fig. 3 is a perspective 7 view, showing the parts in. the order in which they are assembled.

The resistance element itself forms no part of my present invention and may be of any approved type. It is preferably mounted on a spool of porcelain or other insulating material whose ends 1 appear in the drawings, and is incased in a metal jacket or casing 2 carried by said spool, said jacket being secured by bands 3 of any suitable type.

The terminal members proper comprise cup-shaped ferrules 4 of any suitable'conducting material such as brass, which for rules are secured to the opposite ends of the spool by means of a bolt 5 and a nut 6. The bolt passes' entirely through the spool and is held out of contact with the terminal members by insulating bushings 7 of fiber "or other suitable material, and by washers 8 also preferably of fiber. Of course I do not limit myself to these details, as any suitable means for supporting said ferrules in proper relation to the main body of the de-. vice, may be employed, whether said body is of insulating material or not.

Each terminal member 4; is provided with a hole 9 adapted to receive the bared end of conductor 10, which bared end is $01- dered to the terminal. These conductors pass through an opening in the bosses l1 onthe spool and connect with the resistance unit, not shown. The recesses in the cupshapedmembers are preferably packed with insulating cement or other suitable non-conducting material 12, whereby accidental contact with and mechanical derangement of the inclosed parts is prevented.

The terminal contact ferrules are ada ted to snap into a resilient clip member 13 WE may be of any suitable form, such for ear.

Patented Sept. 16., 1913'.

ample, as that shown in Fig. 2, although I v do'not limit myself to this construction.

It 1s obvious that any one of a number of suitable forms of contact member and colong as the resulting construction permits the device to be readily grasped and forced lnto position in contact with the terminal clips and to be readily removed therefrom. It will be apparent, therefore, that the invention is not limited to the details of construction shown and described, but includes any suitable equivalent .means for'accomplishing the same desired result.

What-I claim as new and desire to secure by Letters Patent of theUnited States, is

1. A resistance unit comprising a resistance element, a surrounding casing, terminal members adjacent each end of said casing, and means electrically insulated from said terminal members mechanically secur-' ing saidparts together to form a unitary structure.

2. A resistance unit comprising a resistance element, a support therefor, cup-shaped terminal members for said resistance, a bolt passing through said members and said support for securing said members thereto, and means insulating said bolt from said ter,

'minal members." 1

3. A resist-ance unit comprising a resist ance element, a support therefor, cup-shaped contact ferrules electrically connected to said resistance unit, and means passingthrough said ferrules and said support for securing said ferrules to said support, said means being insulated from said ferrules.

4. In combination, a. resistance element, an insulating support therefor having projections thereon, electrical connections for said resistance element passing through openings in said projections, contact terminal members to which said electrical con:

nections are secured, said contact members comprising conducting cup-shaped members secured to said support by a bolt, and an insulating bushing and insulating washer between said bolt and each of'said contact members.

5. In combination, a body of insulating material, a resistance wire carried thereby, alined terminal members on opposite ends of said body, each member consisting of a cupshaped conductor having a central hole in the base and a radial aperture in the cylindrical wall, a bolt passing through the central hole in each terminal member, an insulatirig bushing surrounding the bolt at each of said holes and insulating washers secured against the bottom of each of said cup-shaped members by said bolt whereby the various parts are maintained in assembled relation, each end of said resistance Wire passing through one of said radial apertures and soldered within to the corresponding terminal member.

oraeao 6. In combination With a pair of supporting clips, a resistance unit, said unit comprising a resistance element provided with terminals cooperating with saidclips, and acasing surrounding said resistance element, but insulated therefrom and from said terminals.

7. In combination with a pair of supportingclips, a resistance unit, said unit nesses.

WILLIAM L. BLISS. Witnesses:

EDW. E. FR-ANoHo'r, LAUREN A. PETTEBONE. 

